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![[Post New]](/templates/default/images/icon_minipost_new.gif) 20 Jul 2008 22:01:45 IST
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4{x} =x +[x]
in some books solution is 0,5/3 but in some books 0,5/3,-5/3 is also given. which one is correct ??
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20 Jul 2008 22:36:14 IST
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4{x}=x+[x]
4(x-[x])=x+[x]
4x-4[x]=x+[x]
3x=5[x]
valid only for 0,5/3
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20 Jul 2008 22:50:02 IST
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if we substitute -5/3 for x then also the equation gets satisfied.....
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3x=5[x]
substitute -5/3 in L.H.S
= 3(-5/3)
=-5
Substitute -5/3 in R.H.S
=5 [ -5/3 ]
=5 [ -1.666...]
=5(-2)
=-10
It doesn't satisfy.
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20 Jul 2008 22:53:45 IST
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[-x]=-[x]-1
so when -5/3 is substituted you will not get the answer.
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20 Jul 2008 22:57:47 IST
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oopss..., thanks frnds...
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20 Jul 2008 22:59:10 IST
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you are welcome.
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